test_mpi_t_barrier.c

#include <stdlib.h>
#include <stdio.h>
#include <stdbool.h>
#include <mpi.h>
#include <math.h>
#include <sys/time.h>
#include "mpibarrier.h"

double timeduration(struct timeval t1, struct timeval t2)
{
	return (t2.tv_sec-t1.tv_sec)*1000000+(t2.tv_usec-t1.tv_usec);
}

int main(int argc, char **argv)
{
	int iterations, rank;
	int numberofprocess;
    MPI_Init(&argc, &argv);
	if (argc >=2) {
		iterations = atoi(argv[1]);
	}
	else {
		printf("usage: test numberofiterations");
		return 0;
	}

    MPI_Comm_rank(MPI_COMM_WORLD, &rank);
	MPI_Comm_size(MPI_COMM_WORLD, &numberofprocess);
	
    int max_round = ceil(log(numberofprocess) / log(2));

	int j;
	struct timeval t1, t2;
	double duration=0.0;
	//printf("process %d is working\n", rank);
	gettimeofday(&t1,NULL);
	for (j=0; j<iterations; j++) {
		tournament_barrier(rank, numberofprocess, max_round);
	}
	gettimeofday(&t2,NULL);


	duration = timeduration(t1,t2);
	printf("average time in %d rounds on %d process is %f\n", iterations, rank, duration);
	
    MPI_Finalize();
	return 0;
}